Squashed 'wtcsdk-objc/' changes from f0cdfe5..c0f0467

c0f0467 updating readme
0016d9b CHANGING SDK

git-subtree-dir: wtcsdk-objc
git-subtree-split: c0f04674cfeaaecac7b0073b711baa9cb51e70db
Merge commit '92f51a2e263189e783555127c6dd7b1ed8fcb4a4'